Influence of Modifying Mixtures on Si Crystal Formation in Al-7%Si Alloy; Metals; Vol. 8, iss. 2

Influence of Modifying Mixtures on Si Crystal Formation in Al-7%Si Alloy; Metals; Vol. 8, iss. 2

書誌詳細
Parent link:	Metals Vol. 8, iss. 2.— 2018.— [98, 14 p.]
団体著者:	Национальный исследовательский Томский политехнический университет Школа базовой инженерной подготовки Отделение русского языка
その他の著者:	Zykova A. P. Anna Petrovna, Kazantseva L. A. Lyudmila Alekseevna, Popova N. A. Nataljya Anatoljevna, Vorozhtsov A. B. Aleksandr Borisovich, Kurzina I. A. Irina Aleksandrovna
要約:	Title screen Using scanning and transmission electron microscopy, we studied silicon particles formed during the solidification of Al-7%Si alloy when different modifying mixtures were introduced into the melt: (1) a mixture of ultrafine powders Na3AlF6 + K2ZrF6 + TiO2 + ZrO2; (2) K2ZrF6; and (3) the flux Arsal. By differential scanning calorimetry, it was established that modifying mixtures significantly influenced the temperature of the solidification processes. The formation of two types of Si crystals was established. The first type of Si crystals precipitated during the solidification of the eutectic mixture (?-Al + Si) in the form of needles or plates. The second type of Si crystals was segregated from eutectic Al-phases or segregated from the solid phase ?-Al upon cooling in the solid state. The introduction of modifiers led to a shift in solidification temperatures. When fluoride salts were used, there was an increase in the temperature of eutectic solidification. Silicon crystals were large (up to 10 µm), with a local excess of aluminum concentration
言語:	英語
出版事項:	2018
主題:	электронный ресурс труды учёных ТПУ Al-7%Si alloy modification ultrafine powders fine structure phase composition ультратонкие слои фазовый состав
オンライン･アクセス:	https://doi.org/10.3390/met8020098 http://earchive.tpu.ru/handle/11683/57789
フォーマット:	電子媒体図書の章
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660042

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